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arXiv 1402.5512cond-mat.stat-mechcond-mat.str-elhep-thmath-phmath.MP
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二维单体-二聚体模型的格拉斯曼表示

Grassmannian representation of the two-dimensional monomer-dimer model

Nicolas Allegra, Jean-Yves Fortin

摘要:

本文将Grassmann代数应用于二维正方形格子上的单-二聚体统计问题。精确的配分函数,或可能构型的总数,具有固定位置的n个单体的有限集合的二聚体系统可以通过二次费米子理论来表达。我们给出了一个答案,在产品的两个pfetchans和解决方案是密切相关的Kasteleyn结果的纯二聚体问题。关联函数与以前的结果是一致的,无论是在边界上的单体,其中一个简单的精确表达式是在离散和连续的情况下,并在散装的表达进行数值评估。

英文摘要:

We present an application of the Grassmann algebra to the problem of the monomer-dimer statistics on a two-dimensional square lattice. The exact partition function, or total number of possible configurations, of a system of dimers with a finite set of n monomers with fixed positions can be expressed via a quadratic fermionic theory. We give an answer in terms of a product of two pfaffians and the solution is closely related to the Kasteleyn result of the pure dimer problem. Correlation functions are in agreement with previous results, both for monomers on the boundary, where a simple exact expression is available in the discrete and continuous case, and in the bulk where the expression is evaluated numerically.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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